Whenever you travel with a little one that isn't yet potty trained, you're likely to encounter lots of really dirty changing tables and
bathrooms, especially in airports, on airplanes and
at road trip
rest stops.
If your bathtub or shower is tiled inside the enclosure but
stops at the edge, and you can find matching tile, have it extended (or do it yourself, with new ceramic tile mounting kits available
at box stores) the
rest of the way around the
bathroom to the 48» mark, like wainscoting.